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hematocrit

hematocrit is a measure of how much space (volume) the red blood cells take up in the blood. a hematocrit check is often used to test for anemia, which is a decrease in the amount of oxygen-carrying substance (hemoglobin) found in red blood cells.

the hematocrit value may be given as a percentage of red blood cells in a volume of blood. for example, a hematocrit of 33 means that 33% of the blood's volume is composed of red cells. it may also be measured in millilitres per decilitre (ml/dl) of blood.

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